Online Alarm Clock

Multiple alarms, right in the browser

Add alarms by time and give each a label, then toggle them on or off. When an alarm fires, a repeating sound plays until you stop it. All alarms are stored in your browser so they're remembered between sessions.

Just keep the tab open for your alarm to ring on time.

Good for

• Reminders while you work
• Power naps and breaks
• Timed tasks throughout the day

Key features at a glance

• Set as many alarms as you need
• Give each alarm a label and an on/off switch
• Repeating sound alert when an alarm fires
• Alarms are saved in your browser between sessions
• Runs in your browser — keep the tab open to ring
• No app or signup required

How a browser alarm clock works

An online alarm clock watches the current time and triggers a sound when it matches a time you have set. Because it runs in a browser tab rather than as a system service, the one requirement is that the tab stays open so it can keep checking the time and play the alert. As long as it is open, it works just like a bedside or phone alarm.

The alarm sound repeats when it fires so you do not miss it, continuing until you stop it. This makes it suitable not just for gentle reminders but for genuinely getting your attention — a power nap, a meeting you must not miss, or a task that needs doing at a precise moment. Multiple alarms can be active at once, each ringing at its own time.

Why labels and multiple alarms help

Setting several alarms with labels turns a simple clock into a lightweight schedule for your day. Instead of one wake-up time, you can mark a series of moments — a stand-up at 10, a call at 2, a reminder to leave at 5 — each labeled so that when it rings, you immediately know what it is for. The label removes the 'why did I set this?' confusion that a bare time creates.

Individual on/off switches add flexibility: you can keep recurring alarms configured and simply toggle them as needed, rather than recreating them each time. This makes the alarm clock a reusable structure for a routine day. Whether you need one nap timer or a full set of timed prompts, labeled and independently controllable alarms keep them organized and meaningful.

Why locally saved alarms are convenient and private

Your alarms are stored in your browser's local storage, so they persist between sessions without any account to create. Set them once and they are remembered the next time you open the page, ready to toggle on. This makes the tool genuinely usable as a recurring part of your routine rather than something you reconfigure every day.

Because the alarms live only on your device, the times and labels you set — which can hint at your schedule and commitments — stay private. Nothing is uploaded or synced to a server, so there is no account to create and your schedule is never stored or shared anywhere but on your own device. It combines the convenience of remembered settings with the privacy of keeping your schedule entirely to yourself.

Tips for using the alarm clock

• Label each alarm so you know what it is for when it rings
• Keep the browser tab open so alarms can sound on time
• Make sure your device volume is up and not muted
• Toggle recurring alarms off and on instead of recreating them
• Set a backup alarm for anything you really cannot miss

Why choose our online alarm clock?

Our alarm clock is completely free with no signup, no limits, and no subscription. It runs entirely in your browser, supports multiple labeled alarms, and saves them locally so nothing is sent to a server.

It is one of more than 200 free tools on ToopTools, and you can pin it to your My Workspace, a personalized workspace where you keep the tools you use most in a single dashboard. Beside the timer and Pomodoro tools, it covers timed reminders throughout your day.

Common use cases

People use the online alarm clock for reminders while they work, for power naps and breaks where they need to be woken, and for timed tasks scheduled through the day. Multiple labeled alarms keep a whole routine on track.

Remote workers set prompts for meetings and calls, students alarm their study and rest periods, and anyone who wants a reminder at a specific clock time uses it without reaching for their phone. Because alarms are saved, a recurring schedule is ready every day.

Is the online alarm clock free?

Yes. It is completely free with no account, no sign-up, and no usage limits. Set as many alarms as you like at no cost.

Will the alarm ring if I close the tab?

No. The alarm clock needs the browser tab to stay open so it can watch the time and play the sound. Keep the tab open, with the volume up, for your alarms to ring.

Can I set more than one alarm?

Yes. You can set as many alarms as you need, each with its own label and on/off switch, and any number can be active at once, each ringing at its set time.

Are my alarms saved for next time?

Yes. Your alarms are stored in your browser's local storage, so they are remembered between sessions and ready to toggle on the next time you open the page.

Why didn't my alarm sound?

Either the tab was closed or your device was muted. The alarm can only play while the tab is open and the volume is on, so keep both in place for the alert to ring.

Are my alarm times kept private?

Yes. Your alarms are stored only in your browser and never uploaded, so the times and labels you set stay private to your device.

How do I set an alarm in my browser?

Choose the time you want the alarm to go off, give it a label if you like, and the tool will sound at that moment as long as the tab stays open. You can set several alarms, and they are saved for the next time you visit.

Does the online alarm clock work offline?

Yes. The alarm runs entirely in your browser using your device's clock, so once the page has loaded it keeps working without an internet connection, and your alarm times are never uploaded — they stay private on your own device.